IBM System/32 Introduction And Maintenance Manual page 6

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4.6.0 MAINTENANCE 4-97
4.6.41 Carriage Drive Belt
4-136
4.6.1 Printer Cover and Divider Removal and
4.6.42
Upper Paper Clamp 4-137
Replacement 4-97 4.6.43 Upper Paper Clamp Assembly 4-138
4.6.1.1 Printer Cover Grounding 4-97 4.6.44 Lower Paper Clamp (285 Ipm) 4-139
4.6.2 Interlock Switch Description
4-98 4.6.44.1 Two Coil Clamp with Two Engaging
4.6.2.1 Cover Interlock Switch 4-98
Levers 4-139
4.6.2.2 Print Unit (Throat) Interlock Switch 4-99 4.6.44.2 Single Coil Clamp With One Engaging
4.6.2.3 End-of-Forms Interlock Switch
4-99 Lever
4-142
4.6.3 Thermal Switch 4-100
4.6.44.3 Clamp Assembly Removal (Single Coil
4.6.4 Fan Assembly 4-101 Clamp with One Engaging Lever 4-144
4.6.5
24V Relay (Contactor K1) 4-101 4.6.44.4 Clamp Bar Removal (Single Coil Clamp
4.6.6 Diode D 1 Service Check 4-102 with One Engaging Lever) 4-144
4.6.7 Motor Checkout Procedure (285Ipm) 4-103 4.6.44.5 Coil Assembly Removal (Single Coil
Type Belt Motor (285Ipm) 4-103 Clamp with One Engaging Lever) 4-144
Carriage Motor (285 Ipm) 4-104 4.6.45 Forms Tension Assembly (285Ipm) 4-146
4.6.8
Motor Phase Capacitor (285Ipm) 4-105 4.6.45.1 Print Units with Two Paper Clamp
4.6.9 Motor and Paper Clamp Resistor Engaging Levers 4-146
(285Ipm) 4-105 4.6.45.2
Print Units with One Paper Clamp
4.6.10
Print Unit Assembly (285 Ipm) 4-106 Engaging Lever 4-148
4.6.10.1 Print Unit Stop Screw (285 Ipm)
4-108 4.6.46 Forms Jam Detection Device 4-150
4.6.11 Platen Gap (285 Ipm)
4-109 4.6.47 Examples of Incorrect Printing
4.6.12 Platen (285 Ipm) 4-112 (285Ipm)
4-151
4.6.13 Type Belt (285 Ipm) 4-113 4.6.48 Lower Forms Guide To Hammer Bar
Static Test for Type Belt Binds
4-113 Adjustment 4-152
Dynamic Test for Type Belt Binds 4-113
4.6.49 Lower Paper Guide To Hammer
4.6.14 Type Belt Drive Pulley Assembly
4-114 Clearance
4-152
4.6.15 Type Belt Motor
4-115 4.7.0 LOCATIONS (285Ipm) 4-153
4.6.16 Type Belt Positioning Rollers 4-115 4.7.1 Back View 4-153
4.6.17 Type Belt Idler Pulley (285 Ipm) 4-116 4.7.2 Front View
4-154
4.6.18 Type Belt Idler Pulley Pivot Assembly
4-116 4.7.3 Right Side 4-155
4.6.19 Transducer Assembly (285 Ipm)
4-117
4.7.4
Left Side
4-156
4.6.20 Transducer
4-118
4.7.5 Card Gate (285 Ipm) 4-157
4.6.21 Impression Singleshot Potentiometer
4.7.6 Card and I/O Cables (285 Ipm) 4-158
(285Ipm)
4-119
4.8.0 OSCILLOSCOPE FIGURES (285Ipm)
4-159
4.6.22
Transducer Position (Character Cutoff) 4-120
4.6.23 Hammer Flight Time (285 Ipm) 4-120
5.0.0 DISPLAY UNIT
5-'
4.6.24 Hammer Coil (285Ipm)
4-121
5.1.0 THEORY
5-1
4.6.25 Hammer (285Ipm) 4-123
5.1.1 Formation of Characters 5-1
4.6.26 Hammer Block Assembly (285 Ipm)
4-124
5.2.0 FUNCTIONAL CIRCUITS
5-2
4.6.27 Ribbon Drive Description 4-125
5.2.1 High Voltage Oscillator
5-2
4.6.28 Ribbon Cassette (285Ipm)
4-126
5.2.2 Brightness Control 5-2
4.6.29 Ribbon Drive Assembly 4-126
5.2.3 Video Dot Amplifier 5-3
4.6.30 Ribbon Drive Clutch
4-127
5.2.4 Wiggle Sweep Circuit
5-3
4.6.31 Ribbon Drive Belt 4-128
5.2.5
Horizontal Deflection Control 5-3
4.6.32
Ribbon Solenoid 4-129
5.2.6 Vertical Line Control 5-3
4.6.33 Ribbon Drive Rolls and Idler Rolls
5.3.0 OPERATION
5-4
(285Ipm)
4-130
5.4.0
MAINTENANCE 5-5
4.6.34 Ribbon Drag (285 Ipm)
4-130
5.4.1 CRT Safety 5-5
4.6.35
Ribbon Tracking (285 Ipm) 4-131
Protective Equipment 5-5
4.6.36 Ribbon Shields (285 Ipm)
4-132
Cathode Ray Tubes-Safe Handling 5-5
4.6.37 Tractor Drive Shaft 4-134
Transportation Handling 5-5
4.6.38 Tractor Cover 4-134
Storage 5-5
4.6.39
Carriage Tractor/Vernier /Tractor Drive
Testing 5-5
Shaft
4-135
Defective CRT Disposition 5-5
4.6.40 Carriage Motor 4-136
5.4.2 Display Assembly
5-7